Needle-bar assembly for warp knitting machines



Aug. 7, 1951 3 05 I 2,562,939

NEEDLE BAR ASSEMBLY FOR WARPKNITTING MACHINES Filed July 19, 1947 IN VEN TOR. 124m 0/1 08 4 c,- n. ATTORNEY Patented Aug. 7, l951 NEEDLE-BAR" ASSEMBLY FOR WARP KNITTING MACHINES,

\ Harold Noe, Upper Montclair, N. J assignor to Kidde -Manufacturing (20., Inc., Bloomfield,

N. J a corporation of Delaware 1 Application July 19, 1947, SerialNo. 762,017

l wzolaims. (01. 66-114) 1 p The present invention relates to knitting machines, and more particularly to the needle assembly of'warp knitting machines.

. i The presentinvention is concerned withiknitting machines having a needle bar onwhich are secured a plurality of needleblocks supporting the needles.

One of the difliculties heretofore encountered with machmesbrtmsrype was that the bolts or screwsutilized to secure the blocks to the bar retained the blocks against slight shifting primari- 1y by friction. During the knitting operation, when the needles were subjected to severe forces which in turn were transmitted to the bl'ock'sfthe resulting force acting thereon tended to overcome the force of friction holding the blocks in position on the bar. Due to the fact that the blocks were formed of some relatively soft material, such as lead, shifting thereof caused the bolts or screws to enlarge the holes in the blocks through which they extended, thus eventually permitting the blocks to be shifted a sufficient distance to place the needles out of alignment. This necessitated frequent shut down of the machine and the tedious operation of readjusting the blocks to align the needles.

The present invention aims to overcome the foregoing difficulties and disadvantages by providing a needle assembly which is simple in construction, economical to manufacture, and reliable in operation.

Accordingly, an object of the present invention is to provide means for mounting the needle blocks in a predetermined position with respect to the needle bar to thereby align the needles in a simple expedient manner.

Another object is to lock the needle blocks in position to prevent shifting thereof when subjected to severe forces during operation of the machine.

Another object is to facilitate assembling the needle blocks on the needle bar.

A further object consists of the arrangement of parts and the construction of elements whereby the foregoing objects are accomplished.

Other and further objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described, or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description, and is shown in the accompanyin drawing, forming a par-tot the specification,

wherein:

Figure 1 is a fragmentary front elevational view of a needle bar and needle blocks, one block being removed, illustrating the present invention.

Figure 2 is a sectional view taken along the line 2-2 on Figure 1. 1

Figure 3 is a rear velevational view of a needle block.

Referring to the drawing in detail, there is shown, in Figure 1, a portion of a needle barl0 which may be associated with a warp knitting machine or the like, and-a plurality of needle blocks ll mounted side by side on the bar "1..

The bar may be of any .desired length depending upon the width of the warp and any desired number of blocks may be utilized, three blocks being shown by way of example to illustrate the present invention. I i I The needle bar H) has a lengthwise extending groove or recess 12 formed therein just below the upper edge thereof and has a plurality of spaced threaded apertures I4 each adapted for receiving means for securing one of the needle blocks H as will be described hereinafter.

As shown in Figures 2 and 3, the needle blocks II each have an upper section [5 in which the shanks of the needles I6 are embedded, a lower section I! of reduced thickness adapted to engage the front of the needle bar, and a shoulder l9 adapted to overlie the upper edge of the bar. The rear surface of the blocks engaging the front of the bar has a lengthwise extending projection, rib, tongue or bead 2!] extending into and cooperating with the groove I2 to mount and retain the block in a predetermined position with respect to the bar. An aperture 2| is provided in the blocks below the rib 20 adapted to register with an aperture 54 of the bar when the blocks are positioned thereon.

The blocks I l are each adapted to be removably secured to the bar [0 by a screw 22 extending through the aperture 2| in the blocks and threaded into an aperture 14 of the bar. The screws may be of the type having a wrench receiving recess 24 in the head thereof. A lock washer 25 may be disposed between the head and the front of the block.

In assembling the needle blocks, the blocks are positioned against the bar with the ribs 20 seated in the groove !2. The screws 22 are then applied to secure the blocks on the bar. By reason of the interlocking rib and groove arrangement, the blocks are retained in their desired position, and, when subjected to severe forces during the knitmatter herein isto be interpreted From the foregoing description, it will be seenthat the present invention provides an improved needle block and needle bar assembly which is simple in construction and can be manufactured without any material increase in manufacturing costs. The interlocking elements are rugged in construction and can readily withstand such rough usage to which they normally may be subjected.

Asvarious changes may be made in the form, construction and arrangement of the parts herein, without departing from the spirit ands'cope of the invention and without sacrificing any of its advantages, it is to be understood that'all as illustrative and not in any limiting sense.

' It is also to be understood that the following claims are intended t cover all the generic and specific features of the invention herein described, and all statements of the scope 'of the invention which,as a matter of language, might be said to fall therebetweeny I v Iclairn:

1; A needle bar assembly for warp'knitting machines comprising, aneedlebar member having a free edge surface and having anaperture'extending transversely therethrough adjacent said surface, a needle block member having a shoulder surface adapted to'be positioned adjacent said edge surface and having an aperture extending transversely therethrough adjacent said shoulder surface adapted to register with said needle bar member aperture, one of said members having an elongate rib thereon between its said aperture and its said surface and the other of said members having an elongate groove thereon between its said apertureand its said surface for receiving said rib, and'means extending through said apertures for securing said needle block member to said needle bar member.

2. In a knitting machine, a needle bar having a free edge, a threaded aperture extending transversely therethrough adjacent said edge, and a lengthwise extending narrow groove on one side thereof between said aperture and said edge; a needle block having a shoulder positioned adjacent said -ed ge, an aperture extending transversely therethrough adjacent said shoulder adapted to register with said needle bar aperture, and a lengthwise extending narrow rib on one side thereof between said last mentioned aperture and said shoulder positioned in said groove; and a screw extending through said needle block aperture and threadedly secured in said needle bar aperture to secure said needle block tosaid needle bar.

HAROLD C. NOE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 793,556 Wilson et a1 June 27, 1905 834,598 Wiener Oct. 30, 1906 2,113,788 Hirsch Apr. 12, 1938 2,247,303 Lieberknecht June 24, 1941 2,254,201 Anderson Sept. 2, 1941 2,259,655 Morton Oct. 21, 1941 

